Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f3129e4b9baf41…

MALICIOUS

PDF

75.3 KB Created: 2021-03-07 18:11:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: be828cb24956c4f191b4af8d3655067f SHA-1: eb6edf62bc135da4ce41fd0d9613c7494503edc4 SHA-256: 66f3129e4b9baf417a6c56f3ae66b6c89ed1be09671cda1ca3eb7ced5afe7d9c
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, forming a link farm, with the primary malicious redirector identified as 'https://dafemum.ru/wix?keyword=pmea+district+11+2019'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of numerous external links suggests an attempt to distribute traffic or obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/wix?keyword=pmea+district+11+2019 In PDF document text
    • https://gomamuna.weebly.com/uploads/1/3/5/3/135304292/zabufapeg_kowurozavumane_jifaduw.pdfIn PDF document text
    • https://zitadinenere.weebly.com/uploads/1/3/1/8/131871439/5186808.pdfIn PDF document text
    • https://vuzaruluweketex.weebly.com/uploads/1/3/4/4/134478477/lezute.pdfIn PDF document text
    • http://japamawosoj.mygamesonline.org/remudewifegan.pdfIn PDF document text
    • http://geparup.scienceontheweb.net/27137158378.pdfIn PDF document text
    • https://tolubezilonis.weebly.com/uploads/1/3/5/3/135348590/wugojox.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/56229743899.pdfIn PDF document text
    • https://bevikutemo.weebly.com/uploads/1/3/4/6/134648684/tuvip.pdfIn PDF document text
    • http://patedeziw.mypressonline.com/dovuxubuwirix.pdfIn PDF document text
    • http://zomoxoxuriw.mypressonline.com/dewalt_drill_saw_combo_kit.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/gmat_review_book.pdfIn PDF document text
    • https://xumabilere.weebly.com/uploads/1/3/1/1/131163638/sipuvomewiz-voxoralefu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/20280512887.pdfIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_dde19232f0734e62b966d676f4cd49d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sasufufa/28565238149.pdfIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_883a25bebe4b4a96b068f2197521b4e8.pdf?index=trueIn PDF document text
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_fdde7262822b4cab98f7c32f9566b808.pdf?index=trueIn PDF document text
    • http://kipazafar.atwebpages.com/tom_clancys_jack_ryan_season_1_episode_5_cast.pdfIn PDF document text
    • http://zedofaxuboz.onlinewebshop.net/wabenu.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/90016281978.pdfIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_a4b8c982c22c41879688ba67487e5a98.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genedesowul/wogaferisotoj.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/what_is_my_zip_code_uk.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EB 5536 bytes
SHA-256: 436368dc73452abc7c5e5041803624324aeb551fed59d30ea71f123c169e2b99
font_01_sfnt_off0000fba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA1 10636 bytes
SHA-256: 299844932ea2a671ec7081ee098fc261c5bdf52c51a0e79042adfe9702b231c1

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